Help with networking homework

CIS 340

Homework Assignment 4

Fall 2015

Instructions: You are the network manager for North Dakota Power and Light (NDP&L). They have a total of six (6) sites that are networked together via the Internet. NDP&L headquarters is in Pierre uses a standard bus network and has a total of 300 nodes on the network. It also has two network gateways that are Cisco NEXUS 5596UP switches.

Each of the substations that the company controls uses a ring topology for all of their equipment. Substations have the following equipment:

Substation Name	Data Concentrators	Relays	Computers	Switches
Wenatchee	3	35	12	3
Red Bone	5	42	19	6
Minot	1	16	6	2
Absuroka	1	8	4	1
Mud Lake	7	45	28	7

The Mud Lake and Minot substations are in small to medium size urban areas and the other substations are found in rural areas.

Presently each of these substations has no security in place. Describe what measures you should take to protect the networks. This should include some light physical and very complete electronic security measures. At this time NDP&L employs the most current Modbus protocol. Is this appropriate? What protocols would you use? Be sure to defend the choice. You may also change the network topology used at any, or all, of the sites if you wish. How will you defend the gateway connections? If you use devices not presently in the network you need to list what devices are added and defend their inclusion. For example, adding a honeypot, firewall, or bastion server would require itemizing which, how many, and describing the rules used for protection.

Grading:

Format and completeness 5 pts

Network protocol/defense measures 10 pts

Electronic Security 10 pts

Total: 25 pts